1.1 Measuring Battery Wear
Source: Lead-acid battery technician certification textbook,
Battery Association of Japan (BAJ)
• For an MSE (sealed stationary lead-acid battery),
when internal resistance reaches approximately
1.5 times its initial value, a warning will be
issued. Wear (failure) values vary by manufac-
turer.
• Initial values of internal resistance may vary
among batteries with the same capacity, depend-
ing on battery type or manufacturer. Refer to the
graph on the previous page.
• Internal-resistance warnings and failures vary by
manufacturer.
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